and similar crap. This using curl on separate hosts. (My Vienna RSS reaser uses a 304 request rather than a 200, but this is not true for all clients.)

Even if I somehow have a cookie, this should not be the case for everyone else. There is in fact no "feed" directory in "wp-content/cache/supercache/mydomain", but there are directories for "2010", "2009", "page" and so on, as expected.